When you put a call on hold, you can make and receive other calls. However, if a call is left on hold for to long, by default 15 seconds, it will automatically alert your phone again if you are not on another call
1.During the call, either press the HOLD button or press the button on which the call is taking place. The Green light next to the button will change to fast flashing green to show there is a call on hold.
1.If already on a call, end the call by pressing Drop or put it on hold by either pressing Hold or pressing the button which the call is on.
2.Press the button next to the fast flashing Green light. You are connected to the call. The light changes to steady.